x=int(input())
for i in range(3,11):
  if x<i*200:
    print(11-i)
    break x=int(input()) x int(input()) int input() input for i in range(3,11):
  if x<i*200:
    print(11-i)
    break i range(3,11) range 3 11 if x<i*200:
    print(11-i)
    break x<i*200 x i*200 i 200 print(11-i) print 11-i 11 i break x=int(input()) int(input()) x
x=int(input())
for i in range(3,11):
  if x<i*200:
    print(11-i)
    break